package servlet.sys;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebFilter(filterName = "filter", urlPatterns = {"/NewsListServlet","/add.jsp" })
public class LanJieQi implements Filter {

	@Override
	public void destroy() {
		//过滤器销毁
	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
			throws IOException, ServletException {

		HttpServletRequest request = (HttpServletRequest) arg0;
		HttpServletResponse response = (HttpServletResponse) arg1;
		
		String judge = (String)request.getSession().getAttribute("judge");
		String url = (String)request.getRequestURL().toString();
			if (url.contains("Login.jsp")) {
				arg2.doFilter(request, response);
			}else{
				
					if (judge==null||judge.length()<0) {
						response.sendRedirect("index.jsp");
					}else{
						arg2.doFilter(request, response);
					}
			}
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// 初始化

	}

}
